CN116291554B - Lining double-layer double-ring unbonded prestress steel strand positioning device and positioning method thereof - Google Patents
Lining double-layer double-ring unbonded prestress steel strand positioning device and positioning method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 273
- 239000010959 steel Substances 0.000 title claims abstract description 273
- 238000000034 method Methods 0.000 title claims abstract description 22
- 210000003205 muscle Anatomy 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000035515 penetration Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 13
- 238000009434 installation Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 241001391944 Commicarpus scandens Species 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
- E21D11/406—Placing endless lining elements, e.g. from reels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The application discloses a lining double-layer double-ring unbonded prestress steel strand positioning device and a positioning method thereof, wherein the positioning device comprises a first positioning bracket, a second positioning bracket and a first positioning mechanism, wherein the positioning bracket comprises a first radial positioning rib, a first axial positioning rib and a second axial positioning rib; the first positioning brackets are arranged in a plurality, and the first positioning brackets are distributed at intervals along the circumferential direction; the pulley block is used for being detachably connected with the pre-installed outer layer longitudinal steel bars; the anchor groove is provided with steel bar perforations for the steel strands to penetrate through along the two circumferential side surfaces. The application solves the problem of difficult bundle penetration of double-layer double-ring steel strands, solves the problem of oil leakage on the surface of the steel strands caused by the fact that the sheath is easily scratched in the bundle penetration process of the steel strands, improves the bundle penetration efficiency of the steel strands, and ensures the bundle penetration quality.
Description
Technical Field
The application relates to the technical field of tunnel construction, in particular to a lining double-layer double-ring unbonded prestressed steel strand positioning device and a positioning method thereof.
Background
At present, a large-diameter high-internal-water-pressure water delivery shield tunnel can adopt a steel pipe lining or a bonded prestressed concrete structure lining, but has various disadvantages.
In the tunnel construction process, the steel strand needs to be penetrated, namely the steel strand needs to be wound around a circle or a plurality of circles along the circumferential direction, and in the penetrating process of the steel strand, the steel strand is easy to collide or rub with a pre-installed steel bar, so that the sheath of the steel strand is broken, the tensioning of the subsequent steel strand is influenced, the steel strand is easy to be corroded, and the service life of the steel strand is influenced.
Aiming at the related technology, in the prior art, in order to solve the problem that the sheath is easy to break, the thickness of the sheath is generally increased or the material of the sheath is changed, and the mode of increasing the thickness of the sheath can solve the problem that the sheath is easy to break, but the thickness of the sheath is increased, so that the steel strand is not easy to bend, and the penetration of the steel strand is affected; the mode of changing the sheath material is more difficult, and the material which can ensure the thickness of the sheath and solve the problem that the sheath is easy to break is not found in the industry at present.
Disclosure of Invention
In order to help solve the problem that a sheath is easy to break in the steel strand penetrating process, the application provides a lining double-layer double-ring unbonded prestressed steel strand positioning device and a positioning method thereof.
The application provides a lining double-layer double-ring unbonded prestress steel strand positioning device and a positioning method thereof, which adopt the following technical scheme:
first aspect
A liner double-layer double-turn unbonded prestressed steel strand positioning device, comprising:
the first positioning support comprises a first radial positioning rib, a first axial positioning rib and a second axial positioning rib, wherein the first radial positioning rib is used for being connected with a pre-installed outer layer longitudinal steel bar, the first radial positioning rib extends towards the center of the duct piece, the first axial positioning rib and the second axial positioning rib are fixed on the first radial positioning rib and are distributed at intervals along the radial direction, the first axial positioning rib is close to the outer layer longitudinal steel bar, one side of the first axial positioning rib, which is away from the second axial positioning rib, is used for being abutted with an outer layer steel strand, and one side of the second axial positioning rib, which is towards the first axial positioning rib, is used for being abutted with an inner layer steel strand; the first positioning brackets are arranged in a plurality, and the first positioning brackets are distributed at intervals along the circumferential direction;
the pulley block is used for being detachably connected with the pre-installed outer layer longitudinal steel bars, the pulley block is arranged between the adjacent first positioning brackets arranged along the circumferential direction, and one side, close to the outer layer longitudinal steel bars, of the pulley block is used for being in sliding abutting connection with the steel strand;
the anchor groove is arranged between adjacent first positioning brackets arranged along the circumferential direction, and steel bar perforations for the steel strands to penetrate are formed in the anchor groove along the two circumferential side surfaces.
Through adopting above-mentioned technical scheme, when utilizing first locating support to carry out spacing bundle penetration to the steel strand wires. The steel strands can enter the first positioning bracket from the side edge of the first positioning bracket, so that a person can conveniently put through the steel strands, and the first positioning bracket and the steel strands are bound together after putting through the steel strands; the first positioning support can reduce the collision between the steel strand jacket and the pre-installed steel bar, and the risk that the steel strand jacket is easy to damage is reduced. Finally, the two ends of the steel strand are temporarily limited by utilizing the steel bar perforation, and then the two ends of the steel strand are fixedly connected by utilizing the anchorage device. Compared with the traditional construction mode, the double-layer double-ring steel strand threading difficulty is solved, the problem that oil on the surface of the steel strand leaks due to the fact that a sheath is easily scratched in the steel strand threading process is solved, the steel strand threading efficiency is improved, and the threading quality is guaranteed.
Optionally, the anchor groove includes:
an anchor tank bottom template, wherein the plate surface of the anchor tank bottom template is arranged away from the outer layer longitudinal steel bars;
the anchorage device groove side templates are detachably connected to two sides of the anchorage device groove bottom templates along the axial direction of the duct piece;
the anchor groove end template is detachably connected to two ends of the anchor groove bottom template along the circular direction of the duct piece and connected with the anchor groove side template, and the reinforcing steel bar perforation is arranged on the anchor groove end template.
By adopting the technical scheme, the anchor groove is convenient for personnel to quickly assemble on the construction site, the transportation cost is reduced, and meanwhile, the steel bar perforation also plays a role in binding the steel strand.
Optionally, a certain inclination angle is formed between the anchor groove side template and the anchor groove bottom template, a certain inclination angle is formed between the anchor groove end template and the anchor groove bottom template, and the inclination angle is smaller than 90 degrees.
Through adopting above-mentioned technical scheme, make ground tackle groove side form and ground tackle groove end form receive outside force and make can support each other, improved overall structure's atress stability, simultaneously, also be adapted to the bending of steel strand wires, more easily the steel strand wires wear the restraint.
Optionally, the first positioning bracket is further connected with a straightening device, and the straightening device includes:
the straightening positioning frame is movably arranged on the first positioning bracket;
the guide wheels are rotatably connected to the straightening locating rack, at least two guide wheels are arranged, and a plurality of guide wheels are arranged close to the outer-layer circumferential reinforcing steel bars;
the limiting wheel is rotationally connected to the straightening locating rack, is far away from the outer layer circumferential reinforcing steel bar and is positioned between the two guide wheels;
the adjusting piece is arranged on the straightening locating rack and used for adjusting the distance between the limiting wheel and the guide wheel.
Through adopting above-mentioned technical scheme, will smooth out straight device and install on first locating support, the steel strand wires are straightened out straight not to twist reverse under the effect of leading wheel and spacing wheel, and crooked into certain radian, thereby the personnel of being convenient for wear the bundle to the steel strand wires more, reduce the operation steps that need constructor frequently go straight in the bundle process of wearing, the setting of regulating part makes things convenient for personnel to adjust the distance between leading wheel and the spacing wheel, and then the crooked radian of control steel strand wires, further improved the suitability of smooth out straight device.
Optionally, an anchor groove locating support is provided between the anchor groove and the outer layer longitudinal steel bar, and the anchor groove locating support includes:
the support legs are fixed on the outer layer longitudinal steel bars and extend towards the center of the duct piece;
the limiting angle steel is fixed at one end of the supporting leg far away from the outer layer longitudinal steel bar, and an opening of the limiting angle steel faces the center of the duct piece.
Through adopting above-mentioned technical scheme, utilize spacing angle steel to carry out the bearing to the ground tackle groove, weld spacing angle steel and ground tackle groove again after the bearing, realize the fixed of ground tackle groove.
Optionally, a second positioning bracket is disposed in the anchor groove positioning bracket, and the second positioning bracket includes:
the second longitudinal positioning ribs extend along the axial direction of the duct piece, two ends of the second longitudinal positioning ribs are fixedly connected with the supporting legs, two second longitudinal positioning ribs are arranged along the length direction of the supporting legs at intervals, and steel strand limiting cavities for steel strands to penetrate are formed between the second longitudinal positioning ribs and the limiting angle steel and between the two second longitudinal positioning ribs.
Through adopting above-mentioned technical scheme, the second round of steel strand wires passes through from the spacing intracavity of steel strand wires, makes the steel strand wires can only be in the spacing intracavity activity of steel strand wires when wearing the bundle, has further improved the stability and the efficiency that the steel strand wires were worn the bundle.
Optionally, along section of jurisdiction hoop and be close to the both sides of ground tackle groove are provided with the third location support, the third location support includes:
the radial limiting ribs extend along the radial direction and are used for being fixed with the outer-layer circumferential reinforcing steel bars, and at least two radial limiting ribs are arranged and distributed at intervals along the axial direction;
the steel strand welding device comprises a first axial limiting rib and a second axial limiting rib, wherein the first axial limiting rib and the second axial limiting rib extend along the axial direction, two ends of the first axial limiting rib and the second axial limiting rib are fixedly connected with the radial limiting rib, the first axial limiting rib is far away from an outer layer of longitudinal steel bar, one side, close to the second axial limiting rib, of the first axial limiting rib is used for being abutted to a steel strand, and one side, deviating from the first axial limiting rib, of the second axial limiting rib is used for being abutted to the steel strand.
Through adopting above-mentioned technical scheme, utilize radial spacing muscle, first axial spacing muscle and the spacing muscle of second axial to make the steel strand wires can only remove in certain within range, restricted the activity space of steel strand wires, and then the both ends of many steel strand wires can gather near the ground tackle groove, make things convenient for follow-up bundle.
Optionally, the included angle between the connecting lines of the two third positioning brackets and the center of the duct piece is 80-90 degrees.
By adopting the technical scheme, the device can not only realize the aggregation of a plurality of steel strands, but also does not affect the bundling of the steel strands too.
Second aspect
A positioning method of a lining double-layer double-ring unbonded prestressed steel strand comprises the following steps:
s1, blanking and braiding steel strands;
s2, measuring and lofting;
s3, positioning the steel strand: fixing the first positioning bracket and the pulley block on a pre-installed outer layer longitudinal steel bar, positioning and binding the steel strands by using the first positioning bracket and the pulley block, and penetrating the outer ring steel strands and then the inner ring steel strands;
s4, steel strand binding: temporarily installing and fixing positioning plates, wherein the positioning plates are respectively arranged at the anchoring end and the tensioning end of the anchor groove, and the two ends of the steel strand are temporarily fixed by the positioning plates so as to be close to the anchor groove;
s5, installing an anchor groove: and (3) fixing an anchor groove bottom template in advance, penetrating a plurality of steel strands through the steel bar perforation of the anchor groove end template, and fixing the anchor groove end template and the anchor groove side template on the anchor groove bottom template.
Through adopting above-mentioned technical scheme, after the steel strand wires are fixed at first locating support through first locating support and assembly pulley, the both ends of steel strand wires are close to near the ground tackle groove, pass multi-beam steel strand wires through ground tackle groove end template again, utilize ground tackle groove end template to twine the bundle to the steel strand wires, install ground tackle groove end template on ground tackle tank bottom template again and accomplish the location and the installation of steel strand wires. According to the scheme, before formally bundling the steel strands, the steel strands are pre-bundled by using the anchor groove end template, so that subsequent bundling is easier for personnel to operate. Meanwhile, compared with the traditional mode of directly penetrating the steel strand through the anchor groove and then weaving the steel strand by utilizing the anchor in the anchor groove, the steel strand perforation method effectively solves the problem that the steel strand is difficult to perforate, further improves the strand perforation efficiency of the steel strand, and compared with long-distance tunnel construction, not only can effectively lighten the labor intensity of workers, but also can effectively improve the strand perforation efficiency of the steel strand, and further shortens the construction period of the whole engineering.
Optionally, the step of fixing the first positioning bracket and the pulley block to the pre-installed outer layer longitudinal steel bar comprises the following steps: before the outer layer longitudinal steel bars are installed, a plurality of first positioning brackets are welded on the outer layer longitudinal steel bars along the axial direction of the outer layer longitudinal steel bars in advance, and then a plurality of outer layer longitudinal steel bars are installed along the circumferential direction, so that the plurality of first positioning brackets are distributed along the circumferential direction.
Through adopting above-mentioned technical scheme, traditional steel strand wires locate mode is generally along a plurality of positioner of section of jurisdiction hoop welding, and positioner is used to the steel strand wires again and is fixed a position. The construction has the defects that the installation precision requirement of the positioning brackets is high, the horizontal deviation of the adjacent positioning brackets cannot exceed 1cm, otherwise, the subsequent beam penetrating precision of the steel strands can be influenced, and the welding precision of the positioning brackets along the circumferential direction of the duct piece cannot be ensured. Therefore, the application improves the installation precision of the positioning bracket by welding the positioning bracket on the longitudinal steel bar in advance, thereby guaranteeing the subsequent beam penetration precision of the steel strand.
In summary, the present application includes at least one of the following beneficial technical effects:
1. compared with the traditional construction mode, the double-layer double-ring steel strand threading difficulty is solved, the problem that oil on the surface of the steel strand leaks due to the fact that a sheath is easily scratched in the steel strand threading process is solved, the steel strand threading efficiency is improved, and the threading quality is guaranteed.
2. According to the scheme, before formally bundling the steel strands, the steel strands are pre-bundled by using the anchor groove end template, so that subsequent bundling is easier for personnel to operate. Meanwhile, compared with the traditional mode of directly penetrating the steel strand through the anchor groove and then weaving the steel strand by utilizing the anchor in the anchor groove, the steel strand perforation method effectively solves the problem that the steel strand is difficult to perforate, further improves the strand perforation efficiency of the steel strand, and compared with long-distance tunnel construction, not only can effectively lighten the labor intensity of workers, but also can effectively improve the strand perforation efficiency of the steel strand, and further shortens the construction period of the whole engineering.
Drawings
Fig. 1 is a schematic layout view of a steel strand positioning bracket according to embodiment 1 of the present application.
Fig. 2 is a schematic view of a first positioning bracket according to embodiment 1 of the present application.
Fig. 3 is a schematic view mainly showing the pulley block position according to embodiment 1 of the present application.
Fig. 4 is a schematic view showing the positioning of an anchor groove according to embodiment 1 of the present application.
Fig. 5 is a schematic view of a second positioning bracket according to embodiment 1 of the present application.
Fig. 6 is a schematic view mainly showing the structure of an anchor groove according to embodiment 1 of the present application.
Fig. 7 is a schematic view of a third positioning bracket according to embodiment 1 of the present application.
Fig. 8 is a schematic structural view of a straightening device according to embodiment 2 of the present application.
Reference numerals illustrate:
10. a segment; 11. outer layer circumferential reinforcing steel bars; 12. outer layer longitudinal steel bars;
20. a first positioning bracket; 201. a first radial positioning rib; 202. a first axial positioning rib; 203. a second axial positioning rib; 204. auxiliary positioning ribs;
30. pulley block;
40. an anchor groove; 401. an anchor tank bottom template; 402. an anchor groove side template; 403. an anchor groove end template; 404. perforating steel bars; 405. a key slot; 41. an anchor groove positioning bracket; 411. a support leg; 412. limiting angle steel;
50. a second positioning bracket; 501. second longitudinal positioning ribs;
60. a third positioning bracket; 601. radial limit ribs; 602. a first axial limit rib; 603. a second axial limit rib;
70. straightening device; 701. straightening the positioning frame; 702. a guide wheel; 703. an adjusting block; 704. a limiting wheel; 705. a sleeve; 706. and adjusting the rotating rod.
Detailed Description
The application is described in further detail below with reference to fig. 1-8.
In the related art, the tunnel includes a segment 10, an outer circumferential reinforcement 11 disposed inside the segment 10, and an outer longitudinal reinforcement 12 welded inside the outer circumferential reinforcement 11.
Example 1
The embodiment of the application discloses a lining double-layer double-ring unbonded prestressed steel strand positioning device. Referring to fig. 1, the strand positioning device includes a first positioning bracket 20, a pulley block 30, an anchor groove 40, a second positioning bracket 50, and a third positioning bracket 60.
In order to reduce friction between the steel strands and the first positioning bracket 20, the second positioning bracket 50 and the third positioning bracket 60, the first positioning bracket 20, the second positioning bracket 50 and the third positioning bracket 60 are made of polished round steel bars.
Referring to fig. 2, the first positioning brackets 20 are disposed at intervals along the circumferential direction of the duct piece 10, the first positioning brackets 20 include a first radial positioning rib 201, a first axial positioning rib 202 and a second axial positioning rib 203, the first radial positioning rib 201 extends toward the center of the duct piece 10, one end of the first radial positioning rib 201 is welded with the outer layer longitudinal steel bar 12, in an embodiment, the first radial positioning rib 201 may be formed by a plurality of first radial positioning ribs 201 side by side, and the plurality of first radial positioning ribs 201 are welded with the outer layer longitudinal steel bar 12, so as to further improve the stability of connection between the first radial positioning rib 201 and the outer layer longitudinal steel bar 12.
The first axial positioning ribs 202 and the second axial positioning ribs 203 are parallel to the outer layer longitudinal steel bars 12, the first axial positioning ribs 202 and the second axial positioning ribs 203 are welded and fixed on the first radial positioning ribs 201 and are distributed at intervals along the radial direction of the duct piece 10, and the first axial positioning ribs 202 are arranged close to the outer layer longitudinal steel bars 12.
The end of the first axial positioning rib 202 far away from the first radial positioning rib 201 and the outer layer longitudinal steel bar 12 form an opening, and the outer ring steel strand can enter between the first axial positioning rib 202 and the outer layer longitudinal steel bar 12 through the opening; an opening is also formed between the end of the first axial positioning rib 202 and the end of the second axial positioning rib 203, through which the inner ring strand can enter between the first axial positioning rib 202 and the second axial positioning rib 203.
The steel strands are arranged in a double-layer double-ring mode, the outer ring steel strands are penetrated firstly by adopting manual rope penetrating, and then the inner ring steel strands are penetrated.
Referring to fig. 1 and 3, the pulley block 30 is detachably connected to the outer layer longitudinal steel bar 12 and is located between the adjacent first positioning brackets 20, one side of the pulley block 30, which is close to the outer layer longitudinal steel bar 12, is in sliding abutment with the steel strand, and the pulley block 30 is utilized to further improve the beam penetrating efficiency.
Referring to fig. 1 and 4, the anchor groove 40 is installed near the bottom side of the segment 10, an anchor groove positioning bracket 41 is provided between the anchor groove 40 and the outer longitudinal steel bar 12, a second positioning bracket 50 is provided in the anchor groove positioning bracket 41 for limiting the second ring of steel strands, and a third positioning bracket 60 is provided near two sides along the circumferential direction of the segment 10 near the anchor groove 40. The steel strands are limited and threaded by the anchor groove 40, the second positioning bracket 50 and the third positioning bracket 60.
Referring to fig. 4, the anchor groove positioning bracket 41 includes supporting legs 411 and limiting angle steels 412, the supporting legs 411 are welded and fixed on the outer layer longitudinal steel bars 12 and extend towards the center of the duct piece 10, the supporting legs 411 are provided with a plurality of groups along the circumferential direction, each group of supporting legs 411 is provided with two supporting legs 411 and two supporting legs 411 are distributed along the longitudinal direction at intervals, the limiting angle steels 412 are welded and fixed at one ends of the plurality of groups of supporting legs 411 towards the center of the duct piece 10, and the opening of the limiting angle steels 412 faces the center of the duct piece 10. The limiting angle steel 412 is welded with the supporting leg 411 in advance, and then the supporting leg 411 and the outer layer longitudinal steel bar 12 are welded and fixed.
Referring to fig. 4 and 5, the second positioning bracket 50 includes a second longitudinal positioning rib 501, the second longitudinal positioning rib 501 extends along the axial direction of the segment 10, two ends of the second longitudinal positioning rib 501 are fixedly connected with the supporting leg 411, the second longitudinal positioning rib 501 is near two ends of the anchor groove 40, two second longitudinal positioning ribs 501 are arranged along the length direction of the supporting leg 411 at intervals, and a steel strand limiting cavity for the steel strand to penetrate is formed between the second longitudinal positioning rib 501 and the limiting angle steel 412 and between the two second longitudinal positioning ribs 501.
The outer second circle steel strand wires pass from the spacing chamber of steel strand wires between second vertical location muscle 501 and the spacing angle steel 412, and the second circle steel strand wires of inlayer pass from the spacing chamber of steel strand wires between two second vertical location muscle 501, utilize the spacing chamber of steel strand wires to carry out spacingly to the second circle steel strand wires, improve the stability that the steel strand wires were worn to restraint.
Referring to fig. 6, the anchor groove 40 is formed by adopting a ductile fiber concrete prefabricated disassembly-free template, each template of the anchor groove is free from being disassembled, the surface treatment processes such as post roughening and the like are avoided, the construction efficiency is high, and the anchor groove 40 is in an inclined cuboid form.
The anchor groove 40 comprises an anchor groove bottom template 401, an anchor groove side template 402 and an anchor groove end template 403, the anchor groove bottom template 401 is mounted on a limiting angle steel 412, end template bayonets and side template clamping holes are formed in the peripheral side edge of the anchor groove bottom template 401, side template clamping blocks are integrally formed in the bottom side of the anchor groove side template 402 and are clamped in the side template clamping holes, end template clamping blocks are integrally formed in the bottom side of the anchor groove end template 403 and are clamped in the end template bayonets, and reinforcing steel bar perforation 404 is formed in the side face of the anchor groove end template 403.
An anchor groove side template 402 and an anchor groove bottom template 401 have a certain inclination angle, and an anchor groove end template 403 and an anchor groove bottom template 401 have a certain inclination angle, wherein the inclination angle is smaller than 90 degrees, so that the anchor groove side template 402 and the anchor groove end template 403 can mutually support when being stressed.
The inner sides of the anchor groove bottom template 401, the anchor groove side template 402 and the anchor groove end template 403 are formed by adopting a rough template, so that the surface of the formed concrete is smoother, finer and denser; the key groove 405 is formed on the outer side surfaces of the anchor groove bottom template 401, the anchor groove side template 402 and the anchor groove end template 403, and the key groove 405 can be 3mm deep, 20mm wide and 20mm apart, so that the bonding of new and old concrete can be enhanced.
Referring to fig. 1 and 7, the third positioning bracket 60 includes radial spacing ribs 601, first axial spacing ribs 602, and second axial spacing ribs 603, the radial spacing ribs 601 extend radially along the duct piece 10 and are welded and fixed with the outer circumferential steel bars 11, and the radial spacing ribs 601 are arranged in two and are distributed at intervals axially along the duct piece 10.
The first axial limiting rib 602 and the second axial limiting rib 603 axially extend along the duct piece 10, two ends of the first axial limiting rib 602 and the second axial limiting rib 603 are welded and fixed with the two radial limiting ribs 601, the first axial limiting rib 602 is far away from the outer layer longitudinal steel bar 12, one side of the first axial limiting rib 602, close to the second axial limiting rib 603, is used for being abutted with a steel strand, and one side of the second axial limiting rib 603, deviating from the first axial limiting rib 602, is used for being abutted with the steel strand.
The included angle between the connecting lines of the two third positioning brackets 60 and the center of the duct piece 10 is 80-90 degrees, preferably 86.88 degrees, and the connecting line of the anchor groove 40 and the center of the duct piece 10 is an angular bisector of the included angle. That is, the third positioning bracket 60 can not only realize the aggregation of the ends of a plurality of steel strands in the anchor groove, but also not affect the normal bundling of the steel strands.
The implementation principle of the lining double-layer double-ring unbonded prestressed steel strand positioning device provided by the embodiment of the application is as follows: the first positioning bracket 20, the second positioning bracket 50 and the third positioning bracket 60 are utilized to limit and penetrate the steel strands, and after the steel strands penetrate the steel strands, the first positioning bracket 20, the second positioning bracket 50 and the third positioning bracket 60 are bound with the steel strands through binding belts; the first positioning bracket 20, the second positioning bracket 50 and the third positioning bracket 60 can reduce the collision between the steel strand jacket and the pre-installed steel bar, and reduce the risk of easy breakage of the steel strand jacket. Finally, the two ends of the steel strand are temporarily limited by utilizing the steel bar perforation, and then the two ends of the steel strand are fixedly connected by utilizing the anchorage device. Compared with the traditional construction mode, the double-layer double-ring steel strand threading difficulty is solved, the problem that oil on the surface of the steel strand leaks due to the fact that a sheath is easily scratched in the steel strand threading process is solved, the steel strand threading efficiency is improved, and the threading quality is guaranteed.
Example 2
The difference between this embodiment and embodiment 1 is that the first positioning bracket 20 is further connected with a straightening device 70, referring to fig. 8, the straightening device 70 includes a straightening positioning frame 701, two guide wheels 702 rotatably connected to the straightening positioning frame 701, an adjusting block 703 slidably penetrating the straightening positioning frame 701, and a limiting wheel 704 rotatably connected to the adjusting block 703, the two guide wheels 702 are disposed near the outer circumferential reinforcing steel 11, one limiting wheel 704 is far away from the outer circumferential reinforcing steel 11 and is located between the two guide wheels 702, the steel strands pass between the two guide wheels 702 and the one limiting wheel 704, and the two guide wheels 702 and the one limiting wheel 704 bend the steel strands, so that the steel strands can be straightened and have a certain degree of curvature, thereby being more convenient for a person to put through the steel strands.
Wherein, one end of the adjusting block 703 far away from the guide wheel 702 is rotationally connected with an adjusting rotating rod 706, and the adjusting rotating rod 706 is arranged in the straightening locating frame 701 in a penetrating way and is in threaded connection with the straightening locating frame 701. The regulating block 703 and the regulating rotating rod 706 are combined to form a regulating piece, and the vertical distance between the limiting wheel 704 and the connecting line of the two guide wheels 702 can be regulated by utilizing the regulating piece, so that the bending radian of the steel strand is changed, the bending degree of the steel strand is consistent with the bending radian of the whole circle of steel strand, and the steel strand threading is more beneficial to personnel.
Meanwhile, the side wall, close to the center, of the first positioning bracket 20 is welded with an auxiliary positioning rib 204, one side of the straightening positioning bracket 701 is welded with a sleeve 705, the auxiliary positioning rib 204 penetrates through the sleeve 705, and the position of the straightening positioning bracket 701 is limited by the auxiliary positioning rib 204.
When a plurality of turns of steel strands need to be penetrated, the positions of the sleeves 705 and the straightening device 70 are adjusted on the auxiliary positioning ribs 204, so that the steel strands are sequentially arranged on the first positioning bracket 20 side by side. When the inner and outer ring steel strands need to be penetrated, the sleeve 705 is sleeved on the auxiliary positioning rib 204 close to the outer ring, the straightening device 70 is utilized to straighten the outer ring steel strands, and when the inner ring steel strands are penetrated, the sleeve 705 is sleeved on the auxiliary positioning rib 204 close to the inner ring.
In the actual construction process, the straightening device 70 is not required to be arranged on each first positioning bracket 20, and 2-3 straightening devices 70 are arranged in each circle of steel strand penetrating bundles, so that the whole circle of steel strands can be straightened.
The embodiment of the application also discloses a positioning method of the lining double-layer double-ring unbonded prestressed steel strand, which comprises the following steps:
s1, blanking and braiding steel strands.
Specifically, the steel strand adopts a high-strength low-relaxation monofilament to coat an epoxy coating prestress steel strand IECS15.2-1860-GB/T25823-2010, the blanking length of a single steel strand of the outer ring of the anchor cable is 47.25 m (54.3 Kg), and the blanking length of a single steel strand of the inner ring is 46.85m (53.9 Kg). And (3) carrying out whole circle production by manufacturers, distinguishing colors (four colors of red, yellow, black and green) of the inner and outer ring steel strands, and carrying out on-site sizing and blanking.
S2, measuring and lofting.
S3, positioning the steel strand.
Specifically, this engineering steel strand wires adopt double-deck double circle to arrange, carry out the lofting to the locating support by the survey crew earlier, and after the locating support installation was accomplished, the survey crew carries out the locating support installation recheck, then carries out steel strand wires location installation, adopts the manual work to wear the cable by root, and the steel strand wires avoid producing drag friction with the reinforcing bar in the installation, so the locating support adopts smooth round reinforcing bar preparation.
The first positioning brackets 20 are welded to the outer layer longitudinal bars 12 in advance, and a plurality of first positioning brackets 20 are welded to the outer layer longitudinal bars 12 in the axial direction, and then the outer layer longitudinal bars 12 are welded to the outer layer circumferential bars 11, and a plurality of outer layer longitudinal bars 12 are welded in the circumferential direction of the segment 10 so that the plurality of first positioning brackets 20 are distributed at intervals in the circumferential direction.
And a pulley block 30 is installed between adjacent first positioning brackets 20 circumferentially arranged along the duct piece 10, and the pulley block 30 is utilized to further guide the steel strand.
The second positioning bracket 50 and the third positioning bracket 60 are welded in sequence.
The first positioning bracket 20, the pulley block 30, the second positioning bracket 50 and the third positioning bracket 60 are utilized to position and bundle the steel strands, and the outer ring steel strands are penetrated first and then the inner ring steel strands are penetrated.
S4, steel strand binding.
Specifically, the positioning plates are temporarily installed and fixed, the positioning plates are respectively arranged at the anchoring end and the tensioning end of the anchor groove 40, and the two ends of the steel strand are temporarily fixed by the positioning plates, so that the two ends of the steel strand are arranged close to the anchor groove 40.
S5, installing an anchor groove 40.
Specific: the anchor groove locating support 41 and the outer layer longitudinal steel bars 12 are welded and fixed in advance, the fixed anchor groove bottom template 401 is installed on the anchor groove locating support 41, a plurality of steel strands penetrate through steel bar perforation 404 of the anchor groove end template 403, the anchor groove end template 403 and the anchor groove side template 402 are buckled and fixed on the anchor groove bottom template 401, and finally the end of the steel strands is fixed by anchors.
And finally, manufacturing and installing an anchor groove top template, filling the anchor 40 with cotton wool in the anchor groove 40 during sealing, and cleaning the anchor groove 40 in time after concrete is poured outside the anchor groove 40.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (9)
1. The utility model provides a lining double-deck double round unbonded prestressing steel strand wires positioner which characterized in that includes:
the first positioning support (20), the first positioning support (20) comprises a first radial positioning rib (201), a first axial positioning rib (202) and a second axial positioning rib (203), the first radial positioning rib (201) is used for being connected with a pre-installed outer layer longitudinal steel bar (12), the first radial positioning rib (201) extends towards the center of the duct piece (10), the first axial positioning rib (202) and the second axial positioning rib (203) are fixed on the first radial positioning rib (201) and distributed along radial intervals, one side of the first axial positioning rib (202) which is away from the second axial positioning rib (203) is used for being abutted with an outer layer steel strand, and one side of the second axial positioning rib (203) which is towards the first axial positioning rib (202) is used for being abutted with an inner layer steel strand; the first positioning brackets (20) are provided with a plurality of first positioning brackets (20) which are distributed at intervals along the circumferential direction;
the pulley block (30) is used for being detachably connected with the pre-installed outer layer longitudinal steel bars (12), the pulley block (30) is arranged between the adjacent first positioning brackets (20) arranged along the circumferential direction, and one side, close to the outer layer longitudinal steel bars (12), of the pulley block (30) is used for being in sliding abutting connection with the steel strands;
the anchor groove (40) is arranged between adjacent first positioning brackets (20) arranged along the circumferential direction, and steel bar perforations (404) for the steel strands to penetrate are formed in two side surfaces of the anchor groove (40) along the circumferential direction;
the anchor groove (40) includes:
an anchor tank bottom template (401), wherein the surface of the anchor tank bottom template (401) is arranged away from the outer layer longitudinal steel bar (12);
the anchor groove side templates (402), wherein the anchor groove side templates (402) are detachably connected to two sides of the anchor groove bottom templates (401) along the axial direction of the duct piece (10);
the anchor groove end template (403), anchor groove end template (403) can be dismantled and connect at anchor groove bottom template (401) along the both ends of section of jurisdiction (10) hoop and be connected with anchor groove side template (402), reinforcing bar perforation (404) set up on anchor groove end template (403).
2. The lined double-layer double-turn unbonded prestressed steel strand positioning device of claim 1, wherein: a first inclination angle is formed between the anchor groove side template (402) and the anchor groove bottom template (401), a second inclination angle is formed between the anchor groove end template (403) and the anchor groove bottom template (401), and the angles of the first inclination angle and the second inclination angle are smaller than 90 degrees.
3. The lining double-layer double-ring unbonded prestress wire positioning device according to claim 1, wherein the first positioning bracket (20) is further connected with a straightening device (70), and the straightening device (70) comprises:
a straightening positioning frame (701) movably mounted on the first positioning bracket (20);
the guide wheels (702) are rotatably connected to the straightening locating rack (701), the number of the guide wheels (702) is multiple, and the guide wheels (702) are close to the outer-layer circumferential steel bars (11);
the limiting wheels (704) are rotationally connected to the straightening locating frame (701), and the limiting wheels (704) are far away from the outer-layer circumferential reinforcing steel bars (11) and are positioned between the two guide wheels (702);
the adjusting piece is arranged on the straightening locating frame (701) and used for adjusting the distance between the limiting wheel (704) and the guide wheel (702).
4. The lined double-layer double-turn unbonded prestressed steel strand positioning device of claim 1, wherein: an anchor groove locating support (41) is arranged between the anchor groove (40) and the outer layer longitudinal steel bar (12), and the anchor groove locating support (41) comprises:
the support legs (411) are fixed on the outer layer longitudinal steel bars (12) and extend towards the center of the duct piece (10);
the limiting angle steel (412), limiting angle steel (412) is fixed one end of the landing leg (411) far away from the outer layer longitudinal steel bar (12), and an opening of the limiting angle steel (412) faces to the center of the duct piece (10).
5. The lined double-layer double-turn unbonded prestressed steel strand positioning device of claim 4, wherein: a second positioning bracket (50) is arranged in the anchor groove positioning bracket (41), and the second positioning bracket (50) comprises:
the second longitudinal positioning ribs (501), the second longitudinal positioning ribs (501) extend along the axial direction of the duct piece (10), two ends of the second longitudinal positioning ribs (501) are fixedly connected with the supporting legs (411), two second longitudinal positioning ribs (501) are arranged along the length direction of the supporting legs (411) at intervals, and a steel strand limiting cavity for a steel strand to penetrate is formed between the second longitudinal positioning ribs (501) and the limiting angle steel (412) and between the two second longitudinal positioning ribs (501).
6. The lining double-layer double-ring unbonded prestressed steel strand positioning device according to claim 1, wherein third positioning brackets (60) are arranged along the circumferential direction of the duct piece (10) and close to two sides of the anchor groove (40), and the third positioning brackets (60) comprise:
the radial limiting ribs (601) extend in the radial direction and are used for being fixed with the outer-layer circumferential reinforcing steel bars (11), and the radial limiting ribs (601) are at least two and are distributed at intervals along the axial direction;
first axial spacing muscle (602) and second axial spacing muscle (603), first axial spacing muscle (602) and second axial spacing muscle (603) extend along the axial, the both ends and the two of first axial spacing muscle (602) and second axial spacing muscle (603) radial spacing muscle (601) fixed connection, outer longitudinal reinforcement (12) setting is kept away from to first axial spacing muscle (602), one side that first axial spacing muscle (602) is close to second axial spacing muscle (603) is used for with the steel strand wires butt, one side that second axial spacing muscle (603) deviates from first axial spacing muscle (602) is used for with the steel strand wires butt.
7. The lined double-layer double-turn unbonded prestressed steel strand positioning device of claim 6, wherein: the included angle between the connecting lines of the two third positioning brackets (60) and the center of the duct piece (10) is 80-90 degrees.
8. A method for positioning a lining double-layer double-ring unbonded prestressed steel strand, based on the lining double-layer double-ring unbonded prestressed steel strand positioning device as claimed in any one of claims 2 to 7, characterized by comprising the following steps:
s1, blanking and braiding steel strands;
s2, measuring and lofting;
s3, positioning the steel strand: fixing a first positioning bracket (20) and a pulley block (30) on a pre-installed outer layer longitudinal steel bar (12), positioning and binding steel strands by using the first positioning bracket (20) and the pulley block (30), and penetrating an outer ring steel strand and then an inner ring steel strand;
s4, steel strand binding: temporarily installing and fixing a positioning plate, wherein the positioning plate is respectively arranged at an anchoring end and a tensioning end of an anchor groove (40), and the two ends of the steel strand are temporarily fixed by the positioning plate so as to be close to the anchor groove (40);
s5, installing an anchor groove (40): and (3) fixing an anchor groove bottom template (401) in advance, penetrating a plurality of steel strands through the steel bar perforation (404) of the anchor groove end template (403), and fixing the anchor groove end template (403) and the anchor groove side template (402) on the anchor groove bottom template (401).
9. The method of positioning a lined double-layer double-turn unbonded prestressed steel strand of claim 8, wherein said step of securing a first positioning bracket (20) and a pulley block (30) to a pre-installed outer layer longitudinal bar (12) comprises: before the outer layer longitudinal steel bars (12) are installed, a plurality of first positioning brackets (20) are welded on the outer layer longitudinal steel bars (12) along the axial direction of the outer layer longitudinal steel bars (12) in advance, and then a plurality of outer layer longitudinal steel bars (12) are installed along the circumferential direction, so that the plurality of first positioning brackets (20) are distributed along the circumferential direction.
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| CN202310378813.3A CN116291554B (en) | 2023-04-10 | 2023-04-10 | Lining double-layer double-ring unbonded prestress steel strand positioning device and positioning method thereof |
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